Intermetallic Electrode Structure Produced by Thermal Spraying of Water-Atomized Cu-Sn Powders

Abstract:

ntermetallic copper-tin compound (Cu₆Sn₅), acting as a negative electrode, is able to be intercalated and deintercalated by lithium ions during charging and discharging of a rechargeable lithium ion battery made of this intermetallic. Single Cu₆Sn₅ phase powders were successfully prepared by water-atomization of Cu-Sn alloys with subsequent heat treatment of the water-atomized powders. Although forming of the Cu₆Sn₅ intermetallic powders into applicable electrode structures can be produced by using some binders to hold the Cu₆Sn₅ powder particles to form a desired shape, the binder formulations are complicated and unrevealed. In our approach, we employed a thermal spraying technique to form a porous Cu₆Sn₅ intermetallic layer on a Cu plate. The porous Cu₆Sn₅ intermetallic layer was aimed to perform Li insertion and reversible extraction functions and the Cu plate to perform electron collector and supplier functions. It was found that the thermal spraying technique was able to form Cu₆Sn₅ intermetallic electrode structure. The coating layers produced under suitable spraying conditions contained Cu₆Sn₅ as a major phase.

• Periodical: Advanced Materials Research (Volume 747)
• Pages: 534-537
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.747.534
• Online since: August 2013
• Authors: Nithi Intrakrathuk, Viton Uthaisangsuk, Thanyaporn Yotkeaw, Nattaya Tosangthum, Bhanu Vettayanugul, Ruangdaj Tongsri
• Keywords: Cu₆Sn₅ Phase, Intermetallic Electrode Structure, Lithium-Ion Battery

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